CN101361299B - Point-to-multipoint service communication - Google Patents

Abstract

Among a plurality of point-to-multipoint control channels provided by a cell, a particular point-to-multipoint control channel is selected according to a preferred way of receiving the point-to-multipoint service. Control information related to the point-to-multipoint service is received through the selected point-to-multipoint control channel, and then the point-to-multipoint service is received according to the control information.

Description

point-to-multipoint service communication

technical field

The present disclosure relates to point-to-multipoint service communications.

Background technique

FIG. 1 is an exemplary network structure of E-UMTS, which is a mobile communication system.

The E-UMTS system is evolved from the UMTS system, and the 3GPP organization is developing basic specifications applicable to the E-UMTS system. The E-UMTS system may be called a Long Term Evolution (LTE) system.

Referring to FIG. 1 , the E-UMTS network is divided into E-UTRAN 20 and EPC (Evolved Packet Core) 10 . E-UTRAN 20 includes a base station (eNB or eNodeB) 21 . Access Gateway (AG) 11 can be divided into a part for processing user traffic and a part for processing control traffic. The AG part for handling new user traffic and the AG part for handling control traffic can communicate with each other through the newly defined interface.

One or more cells may exist for a single eNodeB (eNB) 21 and an interface for transferring user traffic and/or control traffic may be used between eNodeBs.

The EPC10 may include the AG11, the node used by the user to register the UE, and the like. And, in UMTS of FIG. 1 , an interface for distinguishing E-UTRAN 20 from EPC 10 can be used. The S1 interface can connect multiple nodes between the eNodeB21 and the AG11 (that is, in a many-to-many manner). The eNodeBs are connected to each other through the X2 interface, and the X2 interface always appears between adjacent eNodeBs in the mesh network structure.

FIG. 2 shows an exemplary structure (architecture) of E-UTRAN. Here, the eNB can perform multiple functions: select an Access Gateway (AG), route towards the AG during Radio Resource Control (RRC) activation, schedule and send paging messages, schedule and send Broadcast Channel (BCCH) information, Dynamic resource allocation to UE in link and downlink, eNB measurement configuration and provision (configuration&provision), radio bearer control, radio admission control (RAC) and connection mobility control in LTE_ACTIVE state.

In E-UTRAN, the AG can perform multiple functions: paging initiation, LTE-IDLE state management, user plane encryption, support for Packet Data Convergence Protocol (PDCP), System Architecture Evolution (SAE) bearer control, and contactless Encryption and integrity protection for incoming layer (NAS) signaling.

Figure 3 and Figure 4 show the user plane protocol and control plane protocol stack of E-UTRAN. Here, these protocol layers can be divided into Layer 1 (L1), Layer 2 (L2) and Layer 3 based on the three lower layers of the Open Systems Interconnection (OSI) standard model well known in the field of communication systems (L3).

The physical layer, which is the first layer, provides an information transmission (transmission) service to an upper layer using a physical channel. The physical layer is connected with a medium access control (MAC) layer (at a higher level) through a transport channel, and data between the MAC layer and the physical layer is transferred through the channel. Between different physical layers, that is, between the physical layers on the transmission side and the receiving side, data is transferred through physical channels.

The MAC layer of Layer 2 provides services to the Radio Link Control (RLC) layer (which is a higher layer) through a logical channel. The RLC layer at layer 2 supports reliable data transmission. It should be noted that the RLC layer in Figures 3 and 4 is depicted with dashed lines because the RLC layer itself may not necessarily be present if implemented in and performed by the MAC layer.

The PDCP layer at layer 2 performs header compression functions that reduce unnecessary control information so that it can be efficiently sent over a radio (wireless) interface with a relatively small bandwidth by taking the form of Internet Protocol (IP) packets such as IPv4 or IPv6 sent data.

Only the radio resource control (RRC) layer located at the bottom of the third layer (L3) is defined in the control plane, and controls logical channels, transport channels, and physical channel. Here, the RB represents the service provided by the second layer (L2) for data transmission between the terminal and the UTRAN.

In Figure 3, the RLC and MAC layers (terminated at the eNB on the network side) can perform various functions such as scheduling, automatic repeat request (ARQ) and hybrid automatic repeat request (HARQ). The PDCP layer (terminated on the AG on the network side) can perform various functions for the user plane, such as header compression, integrity protection, and encryption.

In Figure 4, the RLC and MAC layers (terminated at the eNB on the network side) perform the same functions as for the user plane. Here, the RRC layer (terminated at the eNB on the network side) can perform various functions such as broadcasting, paging, RRC connection management, radio bearer (RB) control, mobility functions, and UE measurement reporting and control. The PDCP layer (terminated on the aGW on the network side) can perform various functions for the control plane, such as integrity protection and encryption. NAS (terminated on the aGW on the network side) can perform various functions, such as SAE bearer management, authentication, idle mode mobility processing, paging initiation under LTE-IDLE, signaling between aGW and UE and user Plane security controls.

NAS can be divided into three different states. The first one, if there is no RRC entity in the NAS, it is the LTE_DETACHED state; the second, if there is no RRC connection when storing the minimum UE information, it is the LTE_IDLE state; the third, if the RRC connection is established, then It is in LTE_ACTIVE state. Also, RRC can be divided into two different states, such as RRC_IDLE and RRC_CONNCECTED. In the RRC_IDLE state, when the UE specifies discontinuous reception (DRX) configured by NAS, the UE can receive the broadcast of system information and paging information, and the UE has been assigned an identification (ID) that uniquely identifies the UE in the tracking area . And, in the RRC_IDLE state, no RRC context (context) is stored in the eNB. In the RRC_CONNECTED state, the UE has an E-UTRAN RRC connection and a context in E-UTRAN, so that it is possible to send and/or receive data to/from the network (eNB). Also, the UE can report channel quality information and feedback information to the eNB. In the RRC_CONNECTED state, E-UTRAN knows the cell to which the UE belongs, so that the network can transmit and/or receive data to/from the UE, the network can control the UE's mobility (handover), and the network can perform cell measurements for neighboring cells.

In RRC_IDLE mode, the UE specifies a paging DRX (Discontinuous Reception) cycle. That is, the UE monitors a paging signal at a specific paging occasion of each UE-specific paging DRX cycle. The paging window is the time interval in which paging signals are sent. UE has its own paging window. Paging messages are transmitted on all cells belonging to the same tracking area. If the UE moves from one tracking area to another, the UE sends a Tracking Area Update message to the network to update its location.

FIG. 5 shows an exemplary structure of a physical channel. The physical channel transfers signaling and data between UE Layer 1 (L1) and eNB Layer 1 (L1). As shown in Figure 5, a physical channel transfers signaling and data using radio resources consisting of one or more subcarriers in frequency and one or more symbols in time (i.e., 6 or 7 symbols constitute a subframe with a length of 0.5ms). A specific symbol of a subframe (eg, the first symbol of a subframe) may be used for L1/L2 control channels. The L1/L2 control channel carries L1/L2 control information (signalling).

Figure 6 shows a possible mapping relationship between logical channels and transport channels. In general, transport channels transfer signaling and data between the L1 and MAC layers, and the physical layer is mapped to the transport channels. The types of downlink transport channels can be described as follows: 1. Broadcast channel (BCH) for transmitting system information; 2. Downlink shared channel (DL-SCH), which is characterized by a) supporting HARQ, b) changing Modulation, coding and transmission power to support dynamic link adaptation, c) can broadcast in the whole cell, d) can use beamforming and e) support dynamic and semi-static resource allocation at the same time; 3, paging for paging UE Channel (PCH); and 4. Multicast Channel (MCH) for multicast or broadcast service transmission. Also, the type of uplink transport channel can be described as follows: 1. Uplink Shared Channel (UL-SCH), characterized by a) the ability to use beamforming (probably has no impact on the specification), b) potential modulation and coding to support dynamic link adaptation and c) support HARQ; and 2. Random Access Channel (RACH) normally used for initial access to the cell.

In general, the MAC layer provides data transfer services on logical channels. In this way, a set of logical channel types is defined for different types of data transfer services provided by the MAC layer. Each logical channel type is defined by the type of information conveyed. For example, logical channels are divided into two groups: control channels (used to communicate control plane information) and traffic channels (used to communicate user plane information). The control channel is only used to convey control plane information. Some examples of control channels provided by the MAC are as follows: 1. Broadcast Control Channel (BCCH) as a downlink channel for broadcasting system control information; 2. Paging Control Channel (BCCH) as a downlink channel for delivering paging information PCCH), which is used when the network does not know the cell location of the UE; 3. The common control channel (CCCH) used by the UE when there is no RRC connection between the UE and the network; 4. As a channel for transferring MBMS control information from Multicast Control Channel (MCCH) as a point-to-multipoint downlink channel transmitted by the network to the UE; and 5. Dedicated Control Channel (DCCH) as a point-to-point bidirectional channel for transmitting dedicated control information between the UE and the network. DCCH is used by UEs with RRC connection.

Traffic channels are only used to transfer user plane information. Some examples of traffic channels provided by the MAC are as follows: 1. Dedicated Traffic Channel (DTCH) as a point-to-point channel dedicated to one UE for transferring user information, DTCH can exist in both uplink and downlink; and 2. Multicast Traffic Channel (MTCH) is a point-to-multipoint downlink channel for transporting traffic data from the network to the UE. Different logical channels are mapped onto different transport channels. For example, in uplink, DCCH can be mapped to UL-SCH, and DTCH can be mapped to UL-SCH. And, in downlink, BCCH can be mapped to BCH, PCCH can be mapped to PCH, DCCH can be mapped to DL-SCH, and DTCH can be mapped to DL-SCH.

The inventors have realized that at least the following problems exist in current point-to-multipoint service communications. That is, control information about cell-specific services and non-cell-specific services is provided through a point-to-multipoint control channel, ie, MCCH. Therefore, the signaling and scheduling of cell-specific services and non-cell-specific services cannot be optimized according to the characteristics of the services. For example, control information on non-cell-specific services can be combined across multiple cells and radio resources can thereby be saved. However, the control channel provides control information on cell-specific services and non-cell-specific services. Therefore, the control channel cannot support combining, and thus control information on non-cell-specific services cannot be combined. This results in a wasteful use of radio resources. Based on the recognition of these problems, the inventors conceived the various features and aspects described herein.

Contents of the invention

The present disclosure is directed to receiving point-to-multipoint services in a wireless communication system.

Other aspects of the exemplary embodiments will be set forth in part in the description below, or may be learned by practice of the embodiments. The aspects of the exemplary embodiment may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

In order to achieve the aspects according to the exemplary embodiments, as embodied and broadly described, the features are realized as a method of receiving a point-to-multipoint service in a wireless communication system, the method comprising the steps of: Selecting a point-to-multipoint control channel from a plurality of point-to-multipoint control channels, wherein the point-to-multipoint control channel is selected according to the desired (preferred) way of receiving the point-to-multipoint service; through the selected point receiving control information related to the point-to-multipoint service on a multipoint control channel; and receiving the point-to-multipoint service according to the control information.

In one aspect, the desired (preferred) way of receiving the point-to-multipoint service includes receiving the point-to-multipoint service in a single cell. This control information, including scheduling information, may be received on an L1/L2 control channel. The point-to-multipoint service may be received on a downlink shared channel. The method may also include utilizing an uplink feedback based retransmission scheme. This control information including scheduling information may be received from the eNode B.

In another aspect, the desired (preferred) way of receiving the point-to-multipoint service includes receiving the point-to-multipoint service in a plurality of cells. This control information, including scheduling information, may be received on an MBMS Control Channel (MCCH). The point-to-multipoint service may be received on a multicast channel using L1 combining techniques. This control information including scheduling information may be received from a central node.

According to another embodiment, a method for receiving a point-to-multipoint service in a wireless communication system includes the steps of: selecting a point-to-multipoint control channel among a plurality of point-to-multipoint control channels provided by a cell, wherein the point-to-multipoint The point-to-multipoint control channel is selected according to the area in which the point-to-multipoint service is provided; control information related to the point-to-multipoint service is received through the selected point-to-multipoint control channel; and according to the control information to receive the point-to-multipoint service.

In one aspect, the point-to-multipoint service can be provided to a single cell. This control information, including scheduling information, may be received on an L1/L2 control channel. The point-to-multipoint service may be received on a downlink shared channel. The method may also include utilizing an uplink feedback based retransmission scheme. This control information including scheduling information may be received from the eNode B.

Alternatively, the point-to-multipoint service may be provided to multiple cells. This control information, including scheduling information, may be received on an MBMS Control Channel (MCCH). The point-to-multipoint service may be received on a multicast channel using L1 combining techniques. This control information including scheduling information may be received from a central node.

According to another embodiment, a method for transmitting a point-to-multipoint service in a wireless communication system includes the following steps: providing a plurality of point-to-multipoint control channels to a cell; A point-to-multipoint control channel selected in sending control information to the mobile terminal, wherein the point-to-multipoint control channel is selected according to the desired (preferred) way of sending the point-to-multipoint service; and according to the control information to send the point-to-multipoint service.

In one aspect, the desired (preferred) way of transmitting the point-to-multipoint service includes transmitting the point-to-multipoint service to a single cell. This control information, including scheduling information, may be sent on an L1/L2 control channel.

The point-to-multipoint service may be sent on a downlink shared channel. The method may also include utilizing an uplink feedback based retransmission scheme. This control information including scheduling information may be sent from the eNode B.

In another aspect, the desired (preferred) way of transmitting the point-to-multipoint service includes transmitting the point-to-multipoint service to a plurality of cells. Said control information including scheduling information may be sent on the MBMS Control Channel (MCCH). The point-to-multipoint service may be sent on a multicast channel using L1 combining techniques. This control information including scheduling information may be sent from a central node.

According to another embodiment, a method for transmitting a point-to-multipoint service in a wireless communication system includes the following steps: providing a plurality of point-to-multipoint control channels to a cell; A point-to-multipoint control channel selected in the mobile terminal, wherein the point-to-multipoint control channel is selected according to the area where the point-to-multipoint service is provided; and according to the control information, the transmission of the Point-to-multipoint service.

In one aspect, the point-to-multipoint service can be provided to a single cell. This control information, including scheduling information, may be sent on an L1/L2 control channel. The point-to-multipoint service may be sent on a downlink shared channel. The method may also include utilizing an uplink feedback based retransmission scheme. This control information including scheduling information may be sent from the eNode B.

Alternatively, the point-to-multipoint service may be provided to multiple cells. This control information, including scheduling information, may be sent on an MBMS Control Channel (MCCH). The point-to-multipoint service may be sent on a multicast channel using L1 combining techniques. This control information including scheduling information may be sent from a central node.

It is to be understood that both the foregoing general description and the following detailed description of various features are exemplary and explanatory and are intended to provide further explanation of the claims.

Description of drawings

The accompanying drawings, which are included to provide a further understanding and are incorporated in and constitute a part of this specification, illustrate various exemplary embodiments and together with the description serve to explain principles.

FIG. 1 illustrates an exemplary network structure of an evolved universal mobile telecommunication system (E-UMTS).

FIG. 2 illustrates an exemplary structure of E-UTRAN.

Figure 3 illustrates an exemplary user plane protocol stack for E-UTRAN.

Figure 4 illustrates an exemplary control plane protocol stack for E-UTRAN.

FIG. 5 illustrates an exemplary structure of a physical channel.

FIG. 6 illustrates a mapping relationship between logical channels and transport channels.

7 illustrates an exemplary method of receiving point-to-multipoint services in a wireless communication system.

Detailed ways

The present disclosure relates to point-to-multipoint service communication in a wireless communication system.

According to one embodiment, there are two types of service scenarios for multicast/broadcast transmission: cell-specific content and cell group content. Cell-specific content includes cell broadcast services, such as message distribution on a specific cell, delivered in a single cell transmission. Cell group content includes broadcast services, such as television broadcasts, on multiple cells delivered in a multiple cell transmission.

According to one embodiment, multiple cell and single cell transmissions are managed differently in terms of scheduling and combining. Single cell transmission can be scheduled by eNode B, while multiple cell transmission can be scheduled by a central node such as aGW. Also, a single cell transmission may be provided on a downlink shared channel (DL-SCH), while multiple cell transmissions may be provided on a different channel, such as an L1 combinable multicast channel (MCH). However, single cell transmissions may also be provided on the MCH instead of the DL-SCH.

Multiple cell transmissions can use L1 combination technology. Thus, the central node acts as a source of transmissions for multiple cells in the network. In this case, the same service transmission may be provided on a cell group including cells transmitting the same service.

In contrast, single cell transmissions cannot be combined across multiple eNodeBs because a single cell transmission only covers one cell or one eNodeB. However, individual cell transmissions may be combined within the same eNodeB if the network supports combining.

A central node such as aGW is the source of multiple cell transmissions. The aGW also schedules multiple cell transmissions for cell groups. The aGW may apply semi-persistent scheduling to multiple cell transmissions to apply scheduling to groups of cells. Scheduling information may be provided by in-band signaling on an MBMS Control Channel, such as the MBMS Scheduling Channel (MSCH), which is mapped to the same physical channel carrying the MBMS Traffic Channel (MTCH).

For single cell transmission, considering the scheduling of unicast and other common channels, eNode B instead of aGW dynamically schedules single cell transmission. First, the eNodeB can schedule unicast data based on channel quality reports, and then use downlink resources not scheduled for unicast data to schedule individual cell transmissions. Scheduling information transmitted by a single cell may be provided through L1/L2 control information. L1/L2 control information may include MBMS service ID and UE ID.

For cases where the number of users receiving the multicast service is relatively small, a single cell transmission on the DL-SCH can support Adaptive Modulation and Coding (AMC) and HARQ schemes. The ARQ layer providing the ARQ function at the eNodeB can repeatedly send the same MBMS packet or the same text/multimedia message. Thus, if a UE loses a packet or message, the UE can subsequently retrieve the lost packet or message.

The scheduling information for a certain time interval (for example, one or more Transmission Time Intervals (TTIs)) on the L1/L2 control channel represents the short-term scheduling information for MBMS service transmission within the time interval. Therefore, if the UE acquires the short-term scheduling information transmitted by the MBMS service that the UE wants to receive by receiving the L1/L2 control channel at a certain time interval, the UE receives the downlink resource information indicated by the received short-term scheduling information. (eg time/frequency/code) MBMS service or control information sent by the MBMS service is received at this time interval.

In addition, the UE may receive long-term scheduling information related to MBMS service transmission from the cell. The long-term scheduling information indicates when MBMS service delivery is available. Therefore, the UE receives the L1/L2 control channel within the period indicated by the received long-term scheduling information to acquire short-term scheduling information for MBMS service transmission.

According to one embodiment, the central node (aGW) transfers information related to multiple cell transmissions (eg, information on scheduling/combining) to the eNodeB to control multiple cell transmissions. Then, eNodeB sends some control information received from aGW on Multicast Control Channel (MCCH) or MBMS Scheduling Channel (MSCH). Therefore, there is no RRC layer at aGW. The RRC layer at the eNode B can utilize the control information received from the aGW to control the multicast/broadcast transmission.

The PDCP layer performs header compression for MBMS services. A PDCP layer for MBMS transmission may be located at the center node (aGW). In addition, for one service, there may be one PDCP entity for each cell group, and the cell group may be managed by the aGW.

DL-SCH for MBMS service may not apply ACK/NACK and CQI reporting for MBMS transmission. Furthermore, multiplexing of MBMS and dedicated services onto the same DL-SCH may not be allowed. However, the MAC layer can support the ARQ function for MBMS. In this case, the ARQ or HARQ scheme can be applied in a fixed manner without ACK/NACK from the UE. The number of retransmissions of ARQ or HARQ may be fixed, for example 2 or 3 times, and the retransmissions on DL-SCH may be synchronous to reduce the length of signaling. For this reason, DL-SCH for MBMS may be different from DL-SCH for dedicated service.

According to one embodiment, the multicast/broadcast service will contain cell specific information. If the cells are different, MBMS control information such as service information, radio bearer (RB) information and scheduling information may be different in different cells. Therefore, the MCCH can be configured so that each cell can transmit cell-specific MBMS control information.

The MCCH can provide service information listing all available services in the cell and point-to-multipoint radio bearer (PTM RB) related information on the DL-SCH and per-service multicast channels. Based on the MCCH information, the UE knows how to configure the PTM RB on the DL SCH or the PTM RB on the MCH for the service that the UE is interested in.

MCCH can be mapped to broadcast channel (BCH), MCH or DL-SCH. If MCCH is mapped to BCH, MBMS control information on MCCH can be repeated as system information related to broadcast control channel (BCCH), and different MCCH information can be regarded as several system information blocks (SIBs) on BCH. In this case, BCH can be flexibly assigned to any resource block. If there is no flexibility in BCH allocation, MCCH can be mapped on DL-SCH.

For multiple cell transmission, the network can transmit semi-persistent scheduling of MBMS services through in-band signaling on the MCH. The in-band signaling is soft-combined, so the UE can combine in-band signaling from multiple cells sending the same scheduling information. MSCH can be used for in-band signaling, where MSCH is mapped to MCH. In-band signaling on MSCH may include information related to time/frequency allocation of MBMS services and information related to Modulation and Coding Set (MCS). MCS indicates the type of modulation/coding scheme used for MBMS transmission.

For single cell transmission, L1/L2 control information can be used instead of MSCH. The L1/L2 control information may also control UE Discontinuous Reception (DRX) of DL-SCH for single cell transmission of multicast/broadcast service. Here, the UE monitors the L1/L2 control information at certain intervals within a certain period of time. If the UE finds that the L1/L2 control information includes the service identifier of the service that the UE is interested in, the UE receives MBMS service data on the DL-SCH according to the resource allocation included in the L1/L2 control information.

According to one embodiment, if the frequency band of the cell includes 20Mhz, the method for providing MBMS service in the cell includes providing multicast/broadcast service on the lower 10Mhz and providing unicast service on the upper 10Mhz. Alternatively, the method for providing the MBMS service in the cell includes providing the multicast/broadcast service on a central 10Mhz part of the frequency band and providing the unicast service on a part outside the frequency band of the central 10Mhz part.

Therefore, since the eNode B may not know whether the UE is receiving or wants to receive multicast/broadcast services, if the cell bandwidth (such as 20Mhz) is greater than the minimum UE bandwidth (such as 10Mhz), the UE can indicate that the eNode B receives, or prefers to receive Multicast/broadcast services. After receiving this UE indication, the eNode B can move the unicast service to the 10Mhz where the multicast/broadcast service is sent. This helps the UE to receive multicast/broadcast services and unicast services simultaneously.

However, the eNode B may not be able to move the unicast service to the 10Mhz where the multicast/broadcast service is sent due to the eNode B resource status. Therefore, the eNode B cannot help the UE to receive these two services at the same time. In this case, the UE preferably selects a service to receive between unicast and multicast/broadcast services.

According to one embodiment, UE capacity can be dynamically updated through signaling between UE and eNodeB. Since the eNodeB may not know which multicast/broadcast service the UE wants to receive, the UE calculates the available processing and reception resources based on the resources that the broadcast channel will occupy. Afterwards, the UE reports the calculated processing and reception resource information to the eNode B. Information exchanged between the UE and the eNodeB scheduler may include multiple subcarriers and processing for unicast services.

FIG. 7 illustrates a method of receiving a point-to-multipoint service in a wireless communication system according to an embodiment. In Figure 7, although specific reference is made to MBMS services, it is contemplated that the features described herein may be applied to any type of point-to-multipoint communication service.

Referring to FIG. 7, a UE acquires area information related to an MBMS service in which the UE is interested (S100). The MBMS service can be provided through single cell transmission or multiple cell transmission. Afterwards, the UE determines which MCCH provides control information related to the MBMS service that the UE is interested in based on the information provided by the eNode B (S110). On the one hand, the UE can select the MCCH according to the desired (preferred) way of receiving MBMS services (ie, the preference of receiving MBMS services through single-cell transmission or multiple-cell transmission). On the other hand, the UE can select the MCCH according to the area where the MBMS service is provided. After selecting an appropriate MCCH, the UE receives control information related to the MBMS service that the UE is interested in through the appropriate MCCH (S120).

Therefore, this method of receiving the MBMS service in which the UE is interested will differ according to the type of MBMS service (S130). If the MBMS service is a single cell transmission service, the UE receives scheduling information for the MBMS service provided by the eNode B through the L1/L2 control channel (S140). Then, the UE receives the MBMS service from the cell on the MTCH according to the scheduling information provided by the eNode B (S150).

However, if the MBMS service is a multi-cell transmission service, the UE receives scheduling information for the MBMS service provided by the aGW through the MBMS control channel (S160). Then, the UE receives MBMS services from multiple cells on the MTCH according to the scheduling information provided by the aGW (S170).

In terms of the utility of the features in the described embodiments, it can be clearly understood that these features can be applied to various wireless communication technologies supporting point-to-multipoint service communication, such as LTE (Long Term Evolution) system which is a kind of LTE (Long Term Evolution) system. - UMTS system.

Although the present disclosure has been described in the context of mobile communications, these features can also be used with any wireless communication system such as a PDA or notebook computer that is capable of wireless communication. Furthermore, the use of specific terms to describe the present disclosure should not limit the scope of the embodiments to a specific type of wireless communication system, such as UMTS. These features are also applicable to wireless communication systems using different air interfaces and physical layers, such as TDMA, CDMA, FDMA, WCDMA, etc.

The exemplary embodiments can be implemented as a method, apparatus or article of manufacture using standard programming and/or engineering techniques to produce software, firmware, hardware or any combination thereof. As used herein, the term "article of manufacture" refers to a device implemented in hardware logic (such as an integrated circuit chip, field programmable gate array (FPGA), application-specific integrated circuit (ASIC), etc.) , floppy disk, magnetic tape, etc.), optical memory (CD-ROM, optical disk, etc.), volatile and non-volatile storage devices (such as EEPROM, ROM, PROM, RAM, DRAM, SRAM, firmware, programmable logic, etc.)) code or logic in .

Code in the computer readable medium can be accessed and executed by a processor. The code implementing the exemplary embodiments may also be accessed through transmission media or from a file server on a network. In this case, the article of manufacture implementing the code may include transmission media such as network transmission lines, wireless transmission media, signals propagating through space, radio waves, infrared signals, and the like. Of course, those skilled in the art will recognize many modifications may be made in this configuration without departing from the scope of the present disclosure, and that the article of manufacture may comprise any information bearing media known in the art.

The foregoing embodiments and advantages are merely exemplary and should not be construed as limiting. This guidance can be easily applied to other types of equipment. The descriptions herein are illustrative and not intended to limit the scope of the claims. Many alternatives, modifications and changes will occur to those skilled in the art. In the claims, means-plus-function clauses are intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures.

Claims (40)

1. one kind receives the point-to-multipoint service method in wireless communication system, and this method may further comprise the steps:

In a plurality of point-to-multipoint control channels that the sub-district provides, select a point-to-multipoint control channel, wherein this point-to-multipoint control channel is to select according to the preference mode that receives this point-to-multipoint service;

Receive and the relevant control information of this point-to-multipoint service through selected point-to-multipoint control channel; And

Receive this point-to-multipoint service according to this control information.

2. method according to claim 1, the preference mode that wherein receives this point-to-multipoint service are included in and receive this point-to-multipoint service in the single subdistrict.

3. method according to claim 2 wherein receives this control information that comprises schedule information on the L1/L2 control channel.

4. method according to claim 2 wherein receives this point-to-multipoint service on downlink sharied signal channel.

5. method according to claim 2, this method also comprise the re-transmission scheme of utilization based on uplink feedback.

6. method according to claim 2 wherein receives this control information that comprises schedule information from eNode B.

7. method according to claim 1, the preference mode that wherein receives this point-to-multipoint service are included in and receive this point-to-multipoint service in a plurality of sub-districts.

8. method according to claim 7 wherein receives this control information that comprises schedule information on the MBMS control channel.

9. method according to claim 7 wherein uses the L1 combination technique on Multicast Channel, to receive this point-to-multipoint service.

10. method according to claim 7 wherein receives this control information that comprises schedule information from Centroid.

11. one kind receives the point-to-multipoint service method in wireless communication system, this method may further comprise the steps:

In a plurality of point-to-multipoint control channels that the sub-district provides, select a point-to-multipoint control channel, wherein this point-to-multipoint control channel is to select according to the zone that this point-to-multipoint service is provided;

Receive and the relevant control information of this point-to-multipoint service through selected point-to-multipoint control channel; And

Receive this point-to-multipoint service according to this control information.

12. method according to claim 11, wherein this point-to-multipoint service is provided for single subdistrict.

13. method according to claim 12 wherein receives this control information that comprises schedule information on the L1/L2 control channel.

14. method according to claim 12 wherein receives this point-to-multipoint service on downlink sharied signal channel.

15. method according to claim 12, this method also comprise the re-transmission scheme of utilization based on uplink feedback.

16. method according to claim 12 wherein receives this control information that comprises schedule information from eNode B.

17. method according to claim 11, wherein this point-to-multipoint service is provided for a plurality of sub-districts.

18. method according to claim 17 wherein receives this control information that comprises schedule information on the MBMS control channel.

19. method according to claim 17 wherein uses the L1 combination technique on Multicast Channel, to receive this point-to-multipoint service.

20. method according to claim 17 wherein receives this control information that comprises schedule information from Centroid.

21. one kind is sent the point-to-multipoint service method in wireless communication system, this method may further comprise the steps:

To the sub-district a plurality of point-to-multipoint control channels are provided;

A point-to-multipoint control channel of in these a plurality of point-to-multipoint control channels, selecting through portable terminal sends control information to this portable terminal, and wherein this point-to-multipoint control channel is to select according to the preference mode of sending this point-to-multipoint service; And

Send this point-to-multipoint service according to this control information.

22. method according to claim 21, the preference mode of wherein sending this point-to-multipoint service comprise this point-to-multipoint service is sent to single subdistrict.

23. method according to claim 22 is wherein sent this control information that comprises schedule information on the L1/L2 control channel.

24. method according to claim 22 is wherein sent this point-to-multipoint service on downlink sharied signal channel.

25. method according to claim 22, this method also comprise the re-transmission scheme of utilization based on uplink feedback.

26. method according to claim 22 is wherein sent this control information that comprises schedule information from eNode B.

27. method according to claim 21, the preference mode of wherein sending this point-to-multipoint service comprise this point-to-multipoint service is sent to a plurality of sub-districts.

28. method according to claim 27 is wherein sent this control information that comprises schedule information on the MBMS control channel.

29. method according to claim 27 wherein uses the L1 combination technique on Multicast Channel, to send this point-to-multipoint service.

30. method according to claim 27 is wherein sent this control information that comprises schedule information from Centroid.

31. one kind is sent the point-to-multipoint service method in wireless communication system, this method may further comprise the steps:

To the sub-district a plurality of point-to-multipoint control channels are provided;

A point-to-multipoint control channel of in these a plurality of point-to-multipoint control channels, selecting through portable terminal sends control information to this portable terminal, and wherein this point-to-multipoint control channel is to select according to the zone that this point-to-multipoint service is provided; And

Send this point-to-multipoint service according to this control information.

32. method according to claim 31, wherein this point-to-multipoint service is provided for single subdistrict.

33. method according to claim 32 is wherein sent this control information that comprises schedule information on the L1/L2 control channel.

34. method according to claim 32 is wherein sent this point-to-multipoint service on downlink sharied signal channel.

35. method according to claim 32, this method also comprise the re-transmission scheme of utilization based on uplink feedback.

36. method according to claim 32 is wherein sent this control information that comprises schedule information from eNode B.

37. method according to claim 31, wherein this point-to-multipoint service is provided for a plurality of sub-districts.

38., wherein on the MBMS control channel, send this control information that comprises schedule information according to the described method of claim 37.

39., wherein use the L1 combination technique on Multicast Channel, to send this point-to-multipoint service according to the described method of claim 37.

40., wherein send this control information that comprises schedule information from Centroid according to the described method of claim 37.

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